执行SQL发生错误！错误：Got error 28 from storage engine，语句：SELECT a.*,b.name as sortname,b.filename as sortfilename,c.name as subsortname,c.filename as subfilename,d.type,d.name as modelname,d.urlname,e.* FROM ay_content a LEFT JOIN ay_content_sort b ON a.scode=b.scode LEFT JOIN ay_content_sort c ON a.subscode=c.scode LEFT JOIN ay_model d ON b.mcode=d.mcode LEFT JOIN ay_content_ext e ON a.id=e.contentid WHERE(a.scode in ('5','12','13','14','15','37','38','39','40','41','42','43','44','45','46','47','48','50','51','52','53','55','56','57','58','60','61','62') OR a.subscode='5') AND(a.status=1 AND d.type=2 AND a.date<'2021-06-22 14:44:27') ORDER BY RAND() LIMIT 0,6